<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>无标题文档</title>
<style>
#div1{ width:100px;}
</style>
<script src="jquery-2.0.3.js"></script>
<script>


$(function(){

	
	
	//alert(window.getComputedStyle( $('#div1').get(0) , null )['filter']);
	
	//alert(window.getComputedStyle( $('#div1').get(0) , null ).getPropertyValue('filter'));
	
	/*var $span = $('<span>');
	
	$span.css('width','100px');
	
	$span.css('width');*/
	
	//console.log($('#div1').css('margin-left'));
	
	$('#div1').css('width','+=100');
	
});

</script>
</head>

<body>
<div id="div1">aaaaaaaaaaaa</div>
</body>
</html>
